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// Copyright (C) 2005, 2006 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// $Id: IpHessianUpdater.hpp 1861 2010-12-21 21:34:47Z andreasw $
//
// Authors: Andreas Waechter IBM 2005-12-26
#ifndef __IPHESSIANUPDATER_HPP__
#define __IPHESSIANUPDATER_HPP__
#include "IpAlgStrategy.hpp"
namespace Ipopt
{
/** Abstract base class for objects responsible for updating the
* Hessian information. This can be done using exact second
* derivatives from the NLP, or by a quasi-Newton Option. The
* result is put into the W field in IpData.
*/
class HessianUpdater : public AlgorithmStrategyObject
{
public:
/**@name Constructors/Destructors */
//@{
/** Default Constructor */
HessianUpdater()
{}
/** Default destructor */
virtual ~HessianUpdater()
{}
//@}
/** overloaded from AlgorithmStrategyObject */
virtual bool InitializeImpl(const OptionsList& options,
const std::string& prefix) = 0;
/** Update the Hessian based on the current information in IpData,
* and possibly on information from previous calls.
*/
virtual void UpdateHessian() = 0;
private:
/**@name Default Compiler Generated Methods
* (Hidden to avoid implicit creation/calling).
* These methods are not implemented and
* we do not want the compiler to implement
* them for us, so we declare them private
* and do not define them. This ensures that
* they will not be implicitly created/called. */
//@{
/** Copy Constructor */
HessianUpdater(const HessianUpdater&);
/** Overloaded Equals Operator */
void operator=(const HessianUpdater&);
//@}
};
} // namespace Ipopt
#endif
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